Lifting device



y 1932. H. BREITWIESER LIFTING DEVICE Filed Oct. 30, 1931 hHHHHHHHHHHH U In W}? l or of the service,

Patented May 31, 1932 UNITED STATES CORPORATION OF GERMANY LIFTING..DE3TIOE..

Application filed October 30, 1831, Serial No. 572,053, and in GrmanyApril24, 1931.

This invention relates to a lifting device provided with a counterweight for balancing the load and. being intended especially for use in connection with sluice-like water closures. It is known, as regards such lifting devices as are intended for the lifting and lowering of the sluice gates of weirs, sluices and the like, to make use of hinge chains, one end of the chain being fixed t the sluice gate, whereas the other end holds the counterweight which is suspended from it. Chains of that kind are, however, expensive and suffer, besides, from the drawback that their length increases considerably in the course These and other disadvantages experienced with hinge chains when employed in connection with sluice gates are done away with by the present invention, the gist of which resides therein that hinge racks instead of hinge chains are used. These racks are not only by far cheaper than chains of the type in question, but they are also considerably less sensitive in service, and their length remains invariably the same, so that lifting devices for the purpose stated and provided with said hinge racks are by far better suited than those designed as heretofore.

For reversing the direction a reversing wheel or a plurality thereof may be used. A plurality thereof may, however, be undesired in certain cases, as they increase the erecting and the running cost of the plant, as well as the complicatedness of the same. If, on the other hand, only one such wheel is employed and the reversing is to be effected in the same the reversing is to be effected in the same manner as with joint chains, a reversing wheel of a very large diameter would become necessary, as otherwise the long rack links could not correctly contact with said wheel. Such large reversing wheels are, however, ugly and inconvenient. Now, in order to effect the reversal with the aid of a small reversing wheel in spite of the great length of the rack links, there has now, according to the present invention, a device been designed permitting to effect the reversal in an open loop. Several constructional forms of this device are possible. There maybe provided, for instance,

a guide-yokeabove the-cog wh'eel with which the joint rack links are held positively in engagement by means of guide rolls or equivalent members, said yoke determining the path of the links leaving said wheel in upward direction in such a way that they are conducted back to the wheel on the other side thereof in the form of said open loop, without any possibility to deviate from that path. This con- The sluice gate (not shown) is suspended from a traverse a which in turn is suspended from two joint racks b, of which only one has been. shown in the drawing.

arnum QEFIGE! HEINRICH BREITWIESER, OF GRIESHEIM, NmJDMMSm-ASDT GFERMNYfASSIGNOR? .TO MASCHINENFABRIK AUGSBURGNURN .Ga; OE GERMANY", A

The arrangement and combination of parts on the other or left side is accurately the sameas on the righthand side shown in the drawing. Suspended from the other end of the joint rack b is the counterweight e. The

joint rack is conducted over the cog-wheel f, of which only a few teeth have been drawn in the figure; it is, of course, provided with teeth around its entire circumference. The teeth and the rack links are held in engagement with one another by means of guide rolls 9. Above the wheel f is a yoke-like guide frame it which is so shaped that by this shape the path of the joint rack, or its links respectively, is determined when the links pass from the one side of the wheel to the other side thereof, as appears distinctly from the drawing. It will be obvious that the problem sought to be solved has been solved to perfection.

The cog-wheel (s) f may be driven by any I desired power by the intermediary of any desired means.

, I wish it to be understood that I do not limit myself merely to the details shown in the drawing solely by way of example. Various departures are possible in the details without departing from the invention, as defined in the claim.

I claim:

A lifting device, especially for use in connection with sluice-like water closures, comprising, in combination with the closing member proper and a counterweight therefor, a joint rack connected at one end with said closing member proper and at the other end with said counterweight; a cog-Wheel located atthe place where the direction of the joint rack is reversed and being in engagement with the said rack at two diametrically opposite portions of its circumference; guide rolls located at said portions so as to maintain the engagement; and a yoke located above said cog-wheel and being so shaped as to enable the rack to form an open loop above the said wheel.

In testimony whereof I affix my signature.

HEINRICH BREITWVIESER. 

